Lime Green turns 21

Warmshell Board Adhesive

Warmshell Board Adhesive is a breathable, moisture-wicking adhesive for Warmshell insulation boards applied to porous backgrounds. With a high lime content, it has natural biocidal properties and works with the rest of the Warmshell system to help keep the wall dry. Careful choice of ingredients mean that our adhesive does not contain toxic or persistent biocides and has very low VOCs.

We've designed this product carefully so that it contains 99% lime and sand, while still providing enough stickiness. That means it is much safer from rot or fire compared to most polymer based adhesives. It also means it acts as an active moisture-wicking layer, making sure any moisture in your wall isn't trapped.

Warmshell Board Adhesive is not for use as a tile or stone adhesive, nor for application to waterproofed backgrounds. When applied for External Wall Insulation (EWI) then mechanical fixings should also be used to resist wind loads


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Data Sheet

View technical information about this product here. If you require any other information please contact us


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Carbon Footprint


White to off-white


20 kg bags, 48 per pallet. 


Store in a dry place free from damp and drafts. Shelf life is 6 months when stored correctly. Use within 24 hours once open.  


One bag covers approximately 2.5m2 applied with a 10 mm notched trowel.  


Work in temperatures of 5°C to 25°C.  Backgrounds should be reasonably flat and straight and must be porous: apply an undercoat of Lime Green Duro if necessary. For other substrates check compatibility before commencing work. Ensure surfaces are free from dust and contamination. Do not apply to wet or contaminated backgrounds.